1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2017 Intel Deutschland GmbH 9 * Copyright(c) 2018 Intel Corporation 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * The full GNU General Public License is included in this distribution 21 * in the file called COPYING. 22 * 23 * Contact Information: 24 * Intel Linux Wireless <linuxwifi@intel.com> 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 * 27 * BSD LICENSE 28 * 29 * Copyright(c) 2017 Intel Deutschland GmbH 30 * Copyright(c) 2018 Intel Corporation 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 37 * * Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * * Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in 41 * the documentation and/or other materials provided with the 42 * distribution. 43 * * Neither the name Intel Corporation nor the names of its 44 * contributors may be used to endorse or promote products derived 45 * from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 *****************************************************************************/ 60 #include "rs.h" 61 #include "fw-api.h" 62 #include "sta.h" 63 #include "iwl-op-mode.h" 64 #include "mvm.h" 65 66 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta) 67 { 68 switch (sta->bandwidth) { 69 case IEEE80211_STA_RX_BW_160: 70 return IWL_TLC_MNG_CH_WIDTH_160MHZ; 71 case IEEE80211_STA_RX_BW_80: 72 return IWL_TLC_MNG_CH_WIDTH_80MHZ; 73 case IEEE80211_STA_RX_BW_40: 74 return IWL_TLC_MNG_CH_WIDTH_40MHZ; 75 case IEEE80211_STA_RX_BW_20: 76 default: 77 return IWL_TLC_MNG_CH_WIDTH_20MHZ; 78 } 79 } 80 81 static u8 rs_fw_set_active_chains(u8 chains) 82 { 83 u8 fw_chains = 0; 84 85 if (chains & ANT_A) 86 fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK; 87 if (chains & ANT_B) 88 fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK; 89 if (chains & ANT_C) 90 WARN(false, 91 "tlc offload doesn't support antenna C. chains: 0x%x\n", 92 chains); 93 94 return fw_chains; 95 } 96 97 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta) 98 { 99 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 100 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 101 u8 supp = 0; 102 103 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) 104 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); 105 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) 106 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); 107 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) 108 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); 109 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) 110 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); 111 112 return supp; 113 } 114 115 static u16 rs_fw_set_config_flags(struct iwl_mvm *mvm, 116 struct ieee80211_sta *sta) 117 { 118 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 119 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 120 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 121 bool vht_ena = vht_cap && vht_cap->vht_supported; 122 u16 flags = 0; 123 124 if (mvm->cfg->ht_params->stbc && 125 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) { 126 if (he_cap && he_cap->has_he) { 127 if (he_cap->he_cap_elem.phy_cap_info[2] & 128 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ) 129 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 130 131 if (he_cap->he_cap_elem.phy_cap_info[7] & 132 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ) 133 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_STBC_160MHZ_MSK; 134 } else if ((ht_cap && 135 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) || 136 (vht_ena && 137 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))) 138 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 139 } 140 141 if (mvm->cfg->ht_params->ldpc && 142 ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) || 143 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) 144 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 145 146 if (he_cap && he_cap->has_he && 147 (he_cap->he_cap_elem.phy_cap_info[3] & 148 IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_TX_MASK)) { 149 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK; 150 151 if (he_cap->he_cap_elem.phy_cap_info[3] & 152 IEEE80211_HE_PHY_CAP3_DCM_MAX_TX_NSS_2) 153 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_2_MSK; 154 } 155 156 return flags; 157 } 158 159 static 160 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, 161 int nss) 162 { 163 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & 164 (0x3 << (2 * (nss - 1))); 165 rx_mcs >>= (2 * (nss - 1)); 166 167 switch (rx_mcs) { 168 case IEEE80211_VHT_MCS_SUPPORT_0_7: 169 return IWL_TLC_MNG_HT_RATE_MCS7; 170 case IEEE80211_VHT_MCS_SUPPORT_0_8: 171 return IWL_TLC_MNG_HT_RATE_MCS8; 172 case IEEE80211_VHT_MCS_SUPPORT_0_9: 173 return IWL_TLC_MNG_HT_RATE_MCS9; 174 default: 175 WARN_ON_ONCE(1); 176 break; 177 } 178 179 return 0; 180 } 181 182 static void 183 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, 184 const struct ieee80211_sta_vht_cap *vht_cap, 185 struct iwl_tlc_config_cmd *cmd) 186 { 187 u16 supp; 188 int i, highest_mcs; 189 190 for (i = 0; i < sta->rx_nss; i++) { 191 if (i == MAX_NSS) 192 break; 193 194 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1); 195 if (!highest_mcs) 196 continue; 197 198 supp = BIT(highest_mcs + 1) - 1; 199 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) 200 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); 201 202 cmd->ht_rates[i][0] = cpu_to_le16(supp); 203 if (sta->bandwidth == IEEE80211_STA_RX_BW_160) 204 cmd->ht_rates[i][1] = cmd->ht_rates[i][0]; 205 } 206 } 207 208 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs) 209 { 210 switch (mcs) { 211 case IEEE80211_HE_MCS_SUPPORT_0_7: 212 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1; 213 case IEEE80211_HE_MCS_SUPPORT_0_9: 214 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1; 215 case IEEE80211_HE_MCS_SUPPORT_0_11: 216 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1; 217 case IEEE80211_HE_MCS_NOT_SUPPORTED: 218 return 0; 219 } 220 221 WARN(1, "invalid HE MCS %d\n", mcs); 222 return 0; 223 } 224 225 static void 226 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta, 227 const struct ieee80211_sta_he_cap *he_cap, 228 struct iwl_tlc_config_cmd *cmd) 229 { 230 u16 mcs_160 = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_160); 231 u16 mcs_80 = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_80); 232 int i; 233 234 for (i = 0; i < sta->rx_nss && i < MAX_NSS; i++) { 235 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3; 236 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3; 237 238 cmd->ht_rates[i][0] = 239 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80)); 240 cmd->ht_rates[i][1] = 241 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160)); 242 } 243 } 244 245 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, 246 struct ieee80211_supported_band *sband, 247 struct iwl_tlc_config_cmd *cmd) 248 { 249 int i; 250 unsigned long tmp; 251 unsigned long supp; /* must be unsigned long for for_each_set_bit */ 252 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 253 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 254 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 255 256 /* non HT rates */ 257 supp = 0; 258 tmp = sta->supp_rates[sband->band]; 259 for_each_set_bit(i, &tmp, BITS_PER_LONG) 260 supp |= BIT(sband->bitrates[i].hw_value); 261 262 cmd->non_ht_rates = cpu_to_le16(supp); 263 cmd->mode = IWL_TLC_MNG_MODE_NON_HT; 264 265 /* HT/VHT rates */ 266 if (he_cap && he_cap->has_he) { 267 cmd->mode = IWL_TLC_MNG_MODE_HE; 268 rs_fw_he_set_enabled_rates(sta, he_cap, cmd); 269 } else if (vht_cap && vht_cap->vht_supported) { 270 cmd->mode = IWL_TLC_MNG_MODE_VHT; 271 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); 272 } else if (ht_cap && ht_cap->ht_supported) { 273 cmd->mode = IWL_TLC_MNG_MODE_HT; 274 cmd->ht_rates[0][0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]); 275 cmd->ht_rates[1][0] = cpu_to_le16(ht_cap->mcs.rx_mask[1]); 276 } 277 } 278 279 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 280 struct iwl_rx_cmd_buffer *rxb) 281 { 282 struct iwl_rx_packet *pkt = rxb_addr(rxb); 283 struct iwl_tlc_update_notif *notif; 284 struct ieee80211_sta *sta; 285 struct iwl_mvm_sta *mvmsta; 286 struct iwl_lq_sta_rs_fw *lq_sta; 287 u32 flags; 288 289 rcu_read_lock(); 290 291 notif = (void *)pkt->data; 292 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 293 if (IS_ERR_OR_NULL(sta)) { 294 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 295 notif->sta_id); 296 goto out; 297 } 298 299 mvmsta = iwl_mvm_sta_from_mac80211(sta); 300 301 if (!mvmsta) { 302 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 303 notif->sta_id); 304 goto out; 305 } 306 307 flags = le32_to_cpu(notif->flags); 308 309 lq_sta = &mvmsta->lq_sta.rs_fw; 310 311 if (flags & IWL_TLC_NOTIF_FLAG_RATE) { 312 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); 313 IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n", 314 lq_sta->last_rate_n_flags); 315 } 316 317 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU) { 318 u16 size = le32_to_cpu(notif->amsdu_size); 319 320 if (WARN_ON(sta->max_amsdu_len < size)) 321 goto out; 322 323 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); 324 mvmsta->max_amsdu_len = size; 325 326 IWL_DEBUG_RATE(mvm, 327 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", 328 le32_to_cpu(notif->amsdu_size), size, 329 mvmsta->amsdu_enabled); 330 } 331 out: 332 rcu_read_unlock(); 333 } 334 335 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 336 enum nl80211_band band, bool update) 337 { 338 struct ieee80211_hw *hw = mvm->hw; 339 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 340 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 341 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); 342 struct ieee80211_supported_band *sband; 343 struct iwl_tlc_config_cmd cfg_cmd = { 344 .sta_id = mvmsta->sta_id, 345 .max_ch_width = update ? 346 rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20, 347 .flags = cpu_to_le16(rs_fw_set_config_flags(mvm, sta)), 348 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), 349 .max_mpdu_len = cpu_to_le16(sta->max_amsdu_len), 350 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), 351 .amsdu = iwl_mvm_is_csum_supported(mvm), 352 }; 353 int ret; 354 355 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); 356 357 #ifdef CONFIG_IWLWIFI_DEBUGFS 358 iwl_mvm_reset_frame_stats(mvm); 359 #endif 360 sband = hw->wiphy->bands[band]; 361 rs_fw_set_supp_rates(sta, sband, &cfg_cmd); 362 363 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd); 364 if (ret) 365 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); 366 } 367 368 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 369 bool enable) 370 { 371 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ 372 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); 373 return 0; 374 } 375 376 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) 377 { 378 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 379 380 IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); 381 382 lq_sta->pers.drv = mvm; 383 lq_sta->pers.sta_id = mvmsta->sta_id; 384 lq_sta->pers.chains = 0; 385 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); 386 lq_sta->pers.last_rssi = S8_MIN; 387 lq_sta->last_rate_n_flags = 0; 388 389 #ifdef CONFIG_MAC80211_DEBUGFS 390 lq_sta->pers.dbg_fixed_rate = 0; 391 #endif 392 } 393